Portable tool for working stone, &amp;c.



N0..547,02|. Patented Apr. IO, |900.

J. RUURKE. PORTABLE TOOL FOR WORKING STONE, SLC.

' (Application fixed Feb. e, 1999.) (No Modal.)

me mams sans co, woammo.. WASHINGTON, n. c.

JOHN OROURKE, OF SAIIEM, MASSACHUSETTS.

PORTABLE TOOL FOR WORKING STONE, 8:.6.

SPECIFICATION forming part ef Lettere Patent No. 647,021, dated April 1o, 1900.

Application filed rama-y 6,1899. serial No. 704,640. (No modelo,

To @ZZ whom it may concern:

Be it known that I, JOHN ORoUnKE,a citizen of the United States of America, and a resident of Salem, county of Essex, andCommonwealth of Massachusetts, have invented certain Improvements in Portable Tools for Vorking Stone and other Materials, of which the following, read in connection with the accompanying drawings, is a specification.

This invention has for its object primarily to provide means Vfor pounding, drilling, cutting,polishing, and otherwise working upon stone materials, but is useful in other ways. In the drawings, Figure l shows a plan, and Fig. 2 a longitudinal section, of the toolv embod yin g'this invention. Fig. 3 shows the toolactuating spindle detached. Fig. 4 shows a modified form of a tool-carryin g chuck-spindle. The supporting-shell,which also constitutes a handle or take-hold for the workman to lift and carry the tool about by, comprises the tubular parts A B,which, having screw-threaded connection, telescope one into the other, as shown in Fig. 2. The part B is provided with grooves or cuttings C, and has an outer bev-A eled screwthreaded section h, adapted for engagement with the screw-threaded nut D, whereby the part B may be clamped tightly to the part A and thetwo parts A B will thus be held as one and prevented from displacement during operation of the tool in working use.

The chuck-shaft E has its tang end journaled for support and movement rotatively in the part B. Its rearmost end projecting outwardly from the part B,V aifords means for connection with an ordinary iiexible shaft through which power may be applied for rotating the Chuckshaft. In the parts B E are formed the annular grooves o e to receive the balls 7i, whereby is established a ball-bearing to receive the end thrust or pressure of chuckshaft E, resulting from a blow or pressure of the tool upon its work. In the foremost or head end of said chuck-shaft E is a slot N and socket adapted for receiving the end and key n of spindle-H, through which connection, it will be understood,`motion rotatively may be applied from chuckeshaft E to the spindle H. At the same time the spindle H will permit longitudinal movement in the end of the chuck-shaft E. Said spindle H carries a cam P, arranged for contact with the cam T, which has fixed support in the part A, and on the spindle H is a spiral spring S, bearing one end on the cani P and the other end against the chuck-shaft E.

Itwill now be understood that movement of spindle H rotatively operates the cam P against the cam T for moving the spindle H longitudinally in one direction, carrying and further contracting the spring S against the end of chuck-shaft E, and when the cams P and T arrive to the position for permitting it this spring S reverses the movement longitudinallyof said spindle H. This spring-driven movement of the spindle H is imparted to the drill, chisel, or other tool, which for the time is socketed in the part Aand operates the blow for driving said tool against the work material.

It is to be observed that the parts A B, by reason of the telescoping screw threaded connections thereof, permit being moved so as to lengthen or shorten the distance between cam T and the end face of chuck-shaft E, which movement operates a corresponding expansion or contraction 0f the spring S for .reducing and increasing the strength of blow applicable to the working tool. Desired ad= justmentof'said parts, being secured, is maintainable by the locking-nut D.

Instead of the drilling or pounding action referred' to above it may be desirable at times to use the tool for smoothing and polishing or boring, and to this end I have represented in the drawings, Fig. et, the shaft G, having on its end a chuck fm for receiving the tang end of a bit or other tool. Said shaft may be substituted in place of the spindle H and receive rotative movement simply from chuck shaft E.

The tool as a whole may obviously be lifted and moved about by the workman at will.

I claiml. The combination with a longitudinally slotted chnck-shaft,a spring-actuated spindle having a key at one end adapted to have sliding connection iu the slots of the chuck-shaft and said spindle having cams on one end, of a pair of tubular parts inclosing the chuckshaft and spindle and screwed together whereby the tool may be lengthened or shortened and the tension of the spring regulated, one tube having ball-bearings to receive the thrust IOO of the chuck-shaft and the othei tube having a cam ltherein which eoperates with the cam on the spindle to give a sudden smart endwise impulse to said spindle.

2. The combination with a Chuck-shaft having a ball-race on its rear end furnished with longitudinal elongated slots, a spring-actuated spindle having a key at one end adapted to have sliding connection in the slots of the chuck-shaft, the spindle having cams on one end, and a spiing surrounding'the spindle and held between the cani and the chuckshaft, of a pair of tubular parts inelosing the chuck-shaft and spindle,and secured together, one of said parts having a ball-race and the other a cani, and balls held between the ballrace in said outer section and the rear of the chuck-shaft.

Signed by me at Lynn, Massachusetts, this 3d day of February, A. D. 1899.

JOHN OROURKE.

Witnesses:

M. M. TUTTLE, C. B. TUTTLE. 

